Doppelganger

Doppelganger is a Demon composed of shadow that takes the same shape of his foes by refracting light in various directions. He is encountered as a boss in Devil May Cry 3 and Devil May Cry 3: HD Collection. In the HD version, the player will achieve the award "Step Into The Light" for defeating him.

Appearance
When in an area with darkness, the demon resembles that of Dante in his Devil Trigger form. However, Doppelganger resembles more of Dante's normal form when exposed to the light.

Personality
Nothing much is shown of Doppelganger's personality. When defeated by Dante, however, the demon accepts their own defeat and allows Dante to absorb him without hesitation.

Strategy
As a being of shadow, it must be paralyzed by shining light on it. This stuns him and leaves him open for attack. Otherwise, he is invulnerable.

Before Devil May Cry 3
Due to an unknown circimstance, Doppelganger came to reside within the Temen-ni-gru as it was sealed away by Sparda.

Devil May Cry 3
When Dante first enters the Apparition Incarnate,Doppelganger encounters the Devil Hunter and refracts it's form to resemble Dante. Dante further mocks him for trying to "ask [him] some questions", saying that he's already answered them to himself and battles the demon. After defeating Doppelganger, Dante receives its soul as an attack Style.

Powers and Abilities
Doppelganger is a formidable demon, being able to bend and refract light to take the form of an opponent as well as mimic some of their fighting moves. Uniquely, Doppelganger can also shoot energy made out of some dark energy from their palms or produce a powerful dark energy attack from the ground. Despite it's formidable status ,however, the demon was no match for Dante.

Devil May Cry 3 mobile
In the Devil May Cry 3 mobile game, Doppelganger appears as one of two bosses, the other being Vergil. Doppelganger has the same animations and general appearance as Dante, but is colored black.

Trivia

 * A second player can control the doppelganger by pressing start on a second controller (though the camera only follows Dante). This can be achieved permanently through use of Dante's infinite devil trigger costume.